Psychology of Perception Final Exam

-Inability to recognize identity or nature of sensory stimuli
-Certain structures are for recognizing faces while others are for recognizing objects (no same structure does both)
-Sensory processing is unaffected

Inability to recognize objects

Inability to recognize faces

-Electromagnetic radiation - light reflecting off objects
-Energy travels in waves

-Allows us to perceive color
-Short wavelength = high frequency
-Long wavelength = low frequency
-Different wavelengths result in different colors

-Allows us to perceive brigthness
-Amplitude is the height of the wavelength

-A continuum of electromagnetic energy that that is produced by electric charges and radiated as waves
-Very wide spectrum and humans can only see a small portion, this is referred to as visible light
-Human range = 400-700 nanometers

-Transparent membrane covering the outer eye
-Helps protect the pupil and the eye from outside irritants
-Allows light to pass through it so it can go to the other structures
-More pain receptors than anywhere else on the body

-Hole in the center of the eye
-Regulates the amount of light coming into the eye by the expanding and contracting iris muscles that surround it
-Dark = large pupil, Light = small pupil

-Focusing element of the eye which light passes after passing through the cornea
-Changes size depending on the distance of an object = this is reffered to as "accomodation"
-Changes concavity - the lens must be thin to perceive far objects and more round to perceive closer objects

-Thin, circular structure that is responsible for controling the diameter and size of the pupil and thus the amount of lgiht entering the retina

-A complex network of neurons that covers the inside back of the eye
-These cells include the photoreceptors, horizontal cells, bipolar cells, and ganglion cells
-Where sensory transduction occurs
-Flow of impulses in the retina: Photoreceptors (rods and cones) are stimulated by incoming light --> sends signal to the retina --> the bipolar cells accept signals from rods, cones, or horizontal cells and pass it to the ganglion cell --> impulse goes back through the eye from the photoreceptors to the ganglion cells --> ganglion cell axons are attached to the optic nerve and the impulse is then sent to the LGN via the optic nerve

-A small area in the retina that contains only cone receptors
-Located on the line of sight so when you are looking directly at an image, it is falling on the fovea
-Results in details and sharp vision

-Bundles of nerve fibers that receive input from the ganglion cells and sends to the LGN
-Each optic nerve contains about 1 million ganglion cell fibers

-Area near the optic nerve where the are no cone or rod receptors